ADOPTED LEVELS for 289Fl
Author: C. Morse | Citation: Nucl. Data Sheets 182, 167 (2022) | Cutoff date: 14-Sep-2021
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-3217 keV SY | S(n)= 5523 keV SY | S(p)= 3793 keV SY | Q(α)= 9.95×103 keV 7 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 293Lv α decay (95 MS) | ||
| E(level) (keV) | XREF | T1/2(level) |
| 0 | A | 2.4 s +8-5 % α = 100 % SF < 6 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
$ 289Fl has been reported as the product of the 244Pu(48Ca,3n) reaction at JINR (2000Og05,2004Og07) and GSI (2010Du06,2011Ga19); as the α-decay daughter of 293Lv at JINR (2017Ka66), at GSI (2012Ho12), and at RIKEN (2017Ka66); and in a chemistry experiment using a gas chromatography system at GSI (2014Ya33). In all cases, 289Fl was identified as a member of a chain of α-decaying nuclei terminated by spontaneous fission. Identification of the isotopes in the chains was based on the comparison of the observed decay properties with those of previously known nuclei.
$ Note: 2000Og05, 2001Og01, and 2002Og09 identify 289Fl as 288Fl, but this assignment was later revised.
$ Other: 1999Og10 reports one chain assigned to 289Fl, but the decay properties of this chain have not been reproduced in subsequent publications.
$ Half-lives, branching ratios, and α-decay energies in this evaluation have been computed from the individual events listed in the references above. Half-life uncertainties have been computed according to the method of 1984Sc13. An additional 10 keV systematic uncertainty is assumed for the α-decay energies, which is added in quadrature to the averaged statistical uncertainty.
Q-value: ΔQ(β-)=929, ΔS(n)=918, ΔS(p)=866 (2021Wa16)
Q-value: S(2n)=12606 syst 801, S(2p)=6482 syst 866 (2021Wa16)